Frank h



(No Model.) F. H. BREWSTER. v

ROLL FOR MACHINES FOR WORKING RUBBER, 6w.

Patented May 28, 1895.

said drawings constitute part of this specifi UNITED STATES- PATENT FFICE.

. FRANK H. BREWSTER, OF DERBY, CONNECTICUT, ASSIGNOR TO THE I BIRMINGHAM IRON FOUNDRY, OF SAME PLACE.

RO LL FOR MACHINES FOR WORKING RUBBER,&.G.

SPECIFICATION forming part of Letters Patent No. 540,043, dated May 28, 1895.

Appli fi December 22, 1894. Serial No. 532,655. (No model.)

.To all whom it may concern.-

Be it known that I, FRANK H. BREWSTER, of Derby, in the county of New Haven and State of Connecticut, have invented a new Improvement in Rolls for Machines for Work ing Rubber, &;c.; and I do hereby declare the following, when taken in connection with the accompanying drawings and the letters of reference marked thereon, to be a full, clear, and exact description of the same, and which cation, and represent, in-

Figure 1, a view in central longitudinal section of one form which a reinforced roll constructed in accordance with my invention may assume; Fig. 2, a View thereof in central transverse section.

My invention relates to an improvement in rolls for machines for working rubber, gutta-.

percha, paper, cloth, and other kindred substances, and is particularly designed for the production of rolls for the washing, grinding and calendering machines used in the working of rubber, the object being to provide such machines with rolls adapted to resist crushing and torsional strains, and constructed with particular reference to being kept at a uniform temperature, whether hot or cold.

With these ends in View, my invention consists in a roll for machines for working rubber, gutta-percha, paper, cloth, &c., the said roll havingcertain details of construction as will be hereinafter described, and pointed out in the claim.

In carrying out my invention, as herein shown, I employ two spider-like reinforces A A, each composed of a hub-like center and four radially arranged corresponding arms, as shown in Fig. 2. These reinforces are cast into the roll B, so as to stand at a right angle to the longitudinal axis thereof, and they are located Within the large interior chamber C, formed within the roll, extending nearly to the ends thereof, and contracted at its ends to inmay be varied in form and number and ar.-.

rangement, as circumstances may require,

but they will, of course, be arranged to stand at a right angle to the longitudinal axis of the roll, and be constructed so as not to intercept the circulation of the heating or cooling mediumintroduced into the chamber C thereof. As herein shown, though this is not necessary, the roll is additionally reinforced by a circular series of inwardly projecting, radially arranged, longitudinal ribs E, which converge and taper at their ends, in accordance with the contraction of the ends of the chamber. These reinforcing ribs may also be varied in form and arrangement. As'before stated, their use is not imperative, but they add to the strength of the roll, and better enable it to resist crushing and torsional strains.

Any means found suitable may be employed for maintaining the roll at a uniform temperature, whether that be hot or cold. ,It seems unnecessary for me to show or describe any- I claim as new, and desire to secure by Letters Patent, is

A roll for machines for working rubber, gutta-percha, paper, cloth, &c., the said roll being provided with trunnions and having a large interior chamber, and reinforced by one or more reinforces cast into it,.and standing at a right angle to its longitudinal axis, and

also reinforced by ribs formed integral with the wall of the chamber, and projecting inwardly thereinto, substantially as described.

In testimonywhereof I have signed this specification in the presence of two subscrib ing witnesses.

- FRANK H. BREWSTER. Witnesses:

FRANCIS D. MANNING,- BERNARD HALE. 

